Galchenyuk was injured in the first period of a 3-2 road loss to the Chicago Blackhawks on Wednesday.

The injury appeared to happen when Chicago forward Marian Hossa fell into Galchenyuk along the boards and landed on his knee. Galchenyuk did not play another shift after the collision.

Galchenyuk has 13 goals and 18 assists in 65 games this season. He was playing left wing on Montreal's second line with Tomas Plekanec and Brendan Gallagher at the time of his injury. Captain Brian Gionta, who normally plays right wing, has filled the spot on Plekanec's left side in Galchenyuk's absence.

The Canadiens will face the Tampa Bay Lightning in the first round of the playoffs, though home ice advantage in the series remains to be determined.